Question 526537
={{{(81y^2/(5y^2-20y+20)) *((5y-10)/9y)}}}
={{{(81y^2/(5(y^2-4y+4))) *(5(y-2)/9y)}}}
={{{(9(9)(y)(y)/(5(y^2-4y+4))) *(5(y-2)/9y)}}}
={{{(9(cross(9)cross(y))(y)/(cross(5)(y^2-4y+4))) *(cross(5)(y-2)/(cross(9y)))}}}
={{{9y/(y^2-4y+4) *(y-2)}}}
={{{9y/(y^2-2y-2y+4) *(y-2)}}}
={{{9y(y-2)/(y^2-2y-2y+4)}}}
={{{9y(y-2)/(y(y-2)-2(y-2))}}}
={{{9y(y-2)/(y-2)(y-2))}}}
={{{9y(cross((y-2)))/cross((y-2))(y-2))}}}
={{{9y/(y-2))}}}